Abstract: A developer unit of an electrophotographic image forming apparatus includes a blocking blade having a magnetic fluid and a magnet. The magnetic fluid contacts a developer roller and the metering blade to prevent a developer from flowing to both ends of the metering blade. The magnetic fluid is fixed to the magnet which applies a pressure to the magnetic fluid so that the magnetic fluid contacts the developer roller and the metering blade. Since the magnetic fluid contacts the developer, wear of elements of the developer unit can be reduced, thereby securing durability of the developer unit. Also, a wrap-around phenomenon of the developer can be prevented.

Abstract: Disclosed is a method of manufacturing a semiconductor device. The method comprises the steps of: preparing a silicon substrate having a predetermined lower structure including a gate and a bonding area; forming an interlayer dielectric film on the top side of the substrate; forming a photosensitive film pattern, which exposes an area for providing contact, on the interlayer dielectric film; forming a contact hole exposing a bonding area of the substrate by etching the exposed part of the interlayer dielectric film; removing the photosensitive film pattern; performing a dry cleaning on the exposed bonding area of the substrate so that CF based polymer formed in the etching step is removed; and performing a nitrogen-hydrogen plasma processing on the surface of the exposed bonding area of the substrate so that oxygen polymer and remaining CF-based polymer are removed. Therefore, since hydrogen plasma processing is performed after contact etching, ohmic contact characteristics can be secured.

Abstract: A developer, for an electrophotographic image forming system, includes a developer container for storing developing solution, a developing roller which is partially soaked in the developing solution stored in the developer container and installed to rotate in an opposite direction of a photosensitive medium, a cleaning roller, which is soaked in the developing solution, is installed to rotate opposite to the developing roller and removes the developing solution remaining on the surface of the developing roller, and a developing solution agitator, which agitates the developing solution, and thereby keeps the developing solution in uniform concentration.

Abstract: A liquid developer imaging system and a method using the system for developing an image, including a cartridge for containing a developing solution; a developing container for receiving the developing solution supplied from the cartridge via a predetermined supply line; a developing roller partly submerged in the developing solution contained in the developing container, installed to be rotated facing a photosensitive object; and a metering blade for scraping off the developing solution coated on the surface of the developing roller to a predetermined thickness, is provided. According to the system, a developing supply structure can be considerably simplified because a high-density developing solution is directly used in developing an image without a process of diluting the solution, and an image can be developed to have high definition because the concentration of the developing solution coated on the developing roller is regularly controlled by a metering blade.

Abstract: A device for and a method of cleaning a photoreceptor medium of an electrophotographic image forming apparatus include a magnet which is installed in a lengthwise direction of the photoreceptor medium and is separated from an outer surface of the photoreceptor medium, and a magnetic fluid which fills a space between the magnet and the outer surface of the photoreceptor medium and closely contacts the outer surface of the photoreceptor medium. Accordingly, abrasion of the photoreceptor medium can be prevented, and since the developer does not stick to the magnetic fluid, a decrease in a cleaning efficiency can be prevented.

Abstract: A developer unit of an electrophotographic image forming apparatus includes a blocking blade having a magnetic fluid and a magnet. The magnetic fluid contacts a developer roller and the metering blade to prevent a developer from flowing to both ends of the metering blade. The magnetic fluid is fixed to the magnet which applies a pressure to the magnetic fluid so that the magnetic fluid contacts the developer roller and the metering blade. Since the magnetic fluid contacts the developer, wear of elements of the developer unit can be reduced, thereby securing durability of the developer unit. Also, a wrap-around phenomenon of the developer can be prevented.

Abstract: A liquid image developing system, including a cartridge in which a developer is stored; a supply line; a development container to which the developer is supplied from the cartridge through the supply line; a photo sensitive body in the development container; a development roller partially soaked in the developer in the development container and rotating opposite to the photosensitive body; a depositing member to create a potential difference required to attach the developer to a circumference of the development roller, opposite to the development roller; a metering blade to scratch the developer attached to the circumference of the development roller to a predetermined thickness; and an agitator to agitate the developer contained in the development container. Accordingly, a high-concentration developer can be directly used in the development operation without a dilution operation, and thus the structure to supply the developer can be considerably simplified.

Abstract: A developer, for an electrophotographic image forming system, includes a developer container for storing developing solution, a developing roller which is partially soaked in the developing solution stored in the developer container and installed to rotate in an opposite direction of a photosensitive medium, a cleaning roller, which is soaked in the developing solution, is installed to rotate opposite to the developing roller and removes the developing solution remaining on the surface of the developing roller, and a developing solution agitator, which agitates the developing solution, and thereby keeps the developing solution in uniform concentration.

Abstract: A liquid developer imaging system and a method using the system for developing an image, including a cartridge for containing a developing solution; a developing container for receiving the developing solution supplied from the cartridge via a predetermined supply line; a developing roller partly submerged in the developing solution contained in the developing container, installed to be rotated facing a photosensitive object; and a metering blade for scraping off the developing solution coated on the surface of the developing roller to a predetermined thickness, is provided. According to the system, a developing supply structure can be considerably simplified because a high-density developing solution is directly used in developing an image without a process of diluting the solution, and an image can be developed to have high definition because the concentration of the developing solution coated on the developing roller is regularly controlled by a metering blade.